strange comment
PHP is embedded in HTML documents, so no, we probably wouldn't even have "PHP with no rich media" without HTML.
There are better ways to get "rich media" than Flash, though, and as far as I'm concerned Flash can die in a fire. While we're at it, PHP can jump into the bonfire as well, and leave us with some better programming languages for the Web.
I dunno. Maybe Justin James was making an oblique reference to XHTML, which was a better direction for Web markup to go than a new version of HTML, but for some reason people decided to invent HTML5 and now we're stuck with it.